Patent DE-10053073-A1 (DE)
Title: Assembly for the production of melt spun thermoplastic filament, to produce more than six, has a tangling unit between the filament gathering guide and the drawing stage
Inventor: SCHULZ DETLEV
IPC: D01D5/16
Filed: 2000-10-26
Abstract: The assembly to produce a number of synthetic filaments (5.1,5.2), by melt spinning and drawing and winding, has a tangling unit (13) in the filament path between the filament gathering guide (11) and the drawing stage (2). The specification is an addition to 10023910.2. The assembly to produce a number of synthetic filaments (5.1,5.2), by melt spinning and drawing and winding, has a tangling unit (13) in the filament path between the filament gathering guide (11) and the drawing stage (2). The tangling unit has a filament channel for each filament to be eddied individually, with a gap between neighboring channels equal to the gap (AB) between filaments at the drawing stage to ensure that they run in parallel as they pass a number of times around a godet roller unit (16) over a laying length (BL). The specification is an addition to 10023910.2.  The assembly for the production of synthetic filaments has a number of parallel eddy channels at the tangling unit. To guide at least six filaments around the drawing unit godet rollers, the ratio of the laying length for drawing and the filament gap is BL\/AB <= 100. At the spinneret (1), the gap between the extrusion jets defines the gap (AS) between the filaments. The ratio of the gap between the spun filaments and the filament gap at the tangling unit is AS\/AB\-8. The filament gathering guide and the drawing godet rollers work together to guide the filaments before and after their passage through the eddy channels of the tangling unit. A guide rod for the filaments can be after the tangling unit, with a number of grooves, where each groove guides a filament. The units of the filament production assembly are deployed so that the spinning plane at the spinneret is at an angle to the filament path plane at the drawing stage. A deflection rod changes the filament path plane in front of the filament gathering guide. The filament gathering guide and the tangling unit are in the drawing plane or are between the deflection and the drawing planes. The deflection rod, the filament gathering guide and the tangling unit are mounted to a carrier, which swings between the drawing and spinning planes. At the tangling unit, each eddy channel has a laying slit along its length. The laying slits of two adjacent channels are connected to a common guide slit between them, open at a longitudinal side of the tangling unit to feed in a filament. A filament gatherer is in front of the filament gathering guide, with a moving filament guide with a filament guide groove, a cutter and a suction unit. A drive acts on the yarn guide to gather and cut the filaments. The filament guide and the cutter are after the deflection rod, and the suction unit is in front of the deflection rod. The filament gather is fitted to the carrier. The drawing stage has a take-off godet roller unit (16) and a drawing godet unit (17). The filaments pass a number of times around the godet rollers (18-21). A second tangling unit gives an eddy action to the filaments between the godet rollers at the drawing godet unit, before they are taken off. The filament gathering guide is of a ceramic material, with a guide groove (12.1,12.2) for each filament, spaced at the gap between them for drawing.